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Concept

PCG64

The default pseudorandom number generator in NumPy, belonging to the PCG family. A linear congruential generator produces the underlying state, and output functions involving permutation and xor-shift operations scramble the bits. It has a period of approximately 2^128 and is deterministic and reproducible.

Timeline (last 90 days)

Nov 2

The forensic analysis used SHA-256 and NumPy's PCG64 pseudorandom number generator, deriving the weights from the seed and comparing them bit by bit.

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Nov 2

PCG64 is NumPy's default pseudorandom number generator, belongs to the PCG family, has a period of about 2^128, and produces fully reproducible output given the same seed and call order.

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